Automatic phonograph



Nov. 26, 1946. J, BOYAJIAN 2,411,612

AUTOMATIC PHONOGRAPH Filed June 20, 1940 11 Sheets-Sheet 1 J66 f j I! Nov. 26, 1946. J. A. BOYAJIAN AUTOMATIC PHONOGRAPH 11 Sheets-Sheet a I I Filed June 20, 1940 MwN MN.

NEW NNN 26, 1946- J. A. BOYAJIAN 2,411,612

( AUTOMATIC PHONOGRAPH Filed June 20, 1940 11 Sheets-Sheet 5 Q Q N \9 1\ k a Q Q I i i I l l Nov. 26, 1946- BQYAJIAN 2,411,612

AUTOMATIC PHONOGRAPH Filed June 20, 1940 ll Sheets-Sheet 6 i MMMM w: w

Nov. 26, 19 J. A. BOYAJIAN AUTOMATIC PHONOGRAPH Filed June 20, 1940 11 Sheets-sheaf. '7

4 22am gJ Nov. 26, 1946. 1 J. A. BOYAJIAN 2,411,612

AUTOMATIC PHONOGRAPH 7 Filed June 20, 1940 11 Sheets-Sheet 9 Nov. 26, 19 J. A. BOYAJIAN AUTOMATIC 'PHONOGRAPH Filed Jun 20, 1940 ll Sheets-Sheet l0 Nov. 26, 1946. .1. A. BOYAJIAN 2,411,612

AUTOMATIC 'PHONOGRAPH Filed June 20, 1940 11 Sheets-Sheet 1'1 Patented Nov. 26, 1946 James A. Boyajian, Chicago,

111., assignor to J. P.

Seeburg Corporation, a corporation of Illinois Application June 20, 1940, Serial No. 341,433

2 Claims.

This invention relates to automatic phono-- graphs and particularly to a selector therefor to disclose mechanism adjacent the rear side which may be located in remote relation to the phonograph to effect the selection of any one or a plurality of selected recordings which the.

user may desireto play. v

One of the objects of the invention is to provide a remote control unit for automatic phonographs which is adapted to be rendered op- V erable upon the insertion of a coin or coins.

A further object of the invention is to provide an improved remote control unit for automatic phonographs which is adapted to be installed in the building in which the phonograph is located and to be connected to the phonograph without the necessity of installing special wires between the unit and the phonograph.

A further object of the invention is to provide an improved remote control unit for automatic phonographs which is adapted to transmit a definite number of electrical impulses corresponding to an individual recording to be played. A further object of the invention is to provide an improved control for automatic phonographs, including a remote control unit which is adapted to control the phonograph unit by thetransmis- 'sion therebetween of series of various numbers of impulses of highfrequency.

Other objects, advantages and capabilities of the invention will appear from the following description of preferred embodiments thereof with reference to the accompanying drawings, in which:

Figure 1 is a front sectional elevation of my improved remote control unit taken on the line .l-l of Fig. 2 the outer cover thereof being shown in section and the title holding frame being removed to disclose mechanism normally located behind the title holding frame;

Fig. 2 is a sectional plan view of the remotecontrol unit, the section being taken on the line of the unit;

Fig. 6 is a fragmentary transverse sectional view ofthe upper end of the remote control device, the section being taken on the line 6-6 of Fig. 4;

Fig. "lis a similar view, on the line"|-| of Fig. 1;

Fig.8 is afragmentary sectional detail of a cam mechanism, the section being taken on the the section being taken line 8-8 of Fig. 4;

2-2 of Fig. 1, the cover being cut away to show the interior mechanism;

Fig. 3 is a sectional plan view of'the remote control unit, the section being taken on the line 3-3 of Fig. 1;

Fig. 4 is a front elevational view of the upper portion of the remote control unit, portions of the cover, window, title holding frame, and contact disc being broken away and other portions omitted to disclose interior mechanism;

Fig. 5 is a similar view taken on line 55 of Fig. 2 in which the contact disc and the left-hand switch assembly and associated parts are omitted Fig. 9 is a sectional detail view of one of the selector bars and associated mechanism, the section being taken on the line 9-9 of Fig. 11, the bar being shown in its actuated position; Fig. 10 is a similar view taken on the line ill-Ill of Fig. 11, showing a selector bar in actuated position;

Fig. 11 is a longitudinal sectional view of the upper end of one of the switch assemblies, the section being taken on the line ll--H of Fig. 2;

Fig. 12 is a similar view, the section being taken on the broken line l2-l2 of Fig. 1;

Fig. 13 is a longitudinal sectional view through one of the switch assemblies, the section being taken on the line |3I3 of. Fig. 2;

Fig. 14 is a similar view, the section beingtaken on the broken line l4--l4 of Fig. 2;

Fig. 15 is a wiring diagram showing the electrical system of the remote control unit;

Fig. 16 is a wiring diagram showing the elec- I trical system at the phonograph;

upon which is mounted a receptacle ll whereby a coin of suitable denomination may be inserted. The coin passes into a coin selector I! of well known type which is mounted on the base plate l0.- Rejected coins pass from the selector through a discharge opening l3 into a rejected coin pocket M. A magnetic slug is retained in the selector by a magnet l5 and may be discharged therefrom by means of a button .I 6 which may suitably be mounted in the base of the coin 3 receiving member II. This button is adapted to cooperate with a lever I! pivotally mounted on a bracket |8 which is also secured upon the base plate I0.

The lever I1 cooperates with a lever l9 pivotally mounted on the coin selector l2 and the lever |9 cooperates with an arm 26 in the coin selector which clears the magnetic coin away from the magnet and discharges it through the opening |3 into the rejected coin pocket l4. An accepted coin passes downwardly from the coin selector through a discharge opening 2| from which it drops into a coin box 22. This coin box is substantially housed in a lower bracket 23 which is also mounted on the base plate l0, the coin box being slidable into this bracket from the right in Fig. 5.

An accepted coin descending through the discharge opening 2| engages and swings a light arm 24 which is pivotally mounted on ears 25 carried by a bracket 26 which is mounted on one side of the coin selector |2. Also mounted on the bracket 26 is a leaf switch 21. When the arm 24 is swung to the right as viewed in Fig. 5, the switch 21 is closed momentarily.

Upon the lower end of the bracket 23 is mounted a chassis member 28 (Fig. 1) which serves as a support for a transformer 29 and a thermionic tube 30, an electrolytic condenser 41, a shielded oscillator coil 48, a shielded resonant filter coil 49, and associated electrical elements, the function and operation of which will hereinafter be fully described.

The bracket I8 serves as a support for a threepole switch 3|, a relay 32 and a motor 33 (Fig. 1). A shaft 34 (Fig. 3) is mounted on a bearing 35 carried by the frame of the motor 33 and on a bearing '36 carried by a bracket 31 which is rigidly mounted on the-bracket 23 (Fig. 4). The pinion 38 of the motor 33 is connected to a gear 39 rigidly carried by the shaft 34 through a train of reducing gearing 40 shown in Fig. 4. The elements of this gearing are mounted on the shaft 34 and on a stud shaft 4| carried bythe motor 33.

At its innermost end the shaft 34 carries a crank arm 42 which is connected by a link 43 to a counter 44 so that this counter registers the number of revolutions made by the shaft 34. The counter 44 is mounted on the bracket 31, as shown in Fig. 4. The bracket 31' has rigidly mounted thereon a contact disc 45 of insulating material. This disc carries a plurality of contacts 46 which are spaced at equal distances around the disc 45, leaving a relatively blank space at the lower portion of the disc, as shown in Fig. 4.

These contacts may exceed the number of selections for which the device is intended. Thus, the device illustrated has a capacity of twenty selections and the number of contacts 46 may suitably be twenty-five. The first five contacts on the left of the vacant space as viewed in Fig. 4, are connected together in the manner shown in the wiring diagram of Fig. 15. Upon the disc 45 is mounted a contact ring The contacts 46 and the contact ring 50 are adapted to be engaged by two arms 5| and 52 (Fig. 7) which are rigidly mounted upon a collar 53. The arms 5| and 52 make contact with each other and are mounted on the collar 53 with the aid of pins 54a of insulating material. Their hub portions are insulated from the collar 53 by suitable insulation 55.

The collar 53 is rigidly mounted upon a shaft 4 54 which is mounted in central relation with respect to the disc 45, the contacts 46 and the ring 50. The shaft 54 is rotatably mounted in a boss 56 of the bracket 31, the disc being rigidly mounted on this boss by suitable screws 51. The end of the shaft 54 remote from the collar 53 rigidly carries a bevel gear 58 which meshes with a similar bevel gear 59 which is mounted on the shaft 34.

Rigidly mounted on the shaft 34 is a collar 60 which is provided with a cam member 6|. The cam member 6| (Fig. 7) is adapted to engage a projection 62 on a bar 63 which is mounted for vertical movement. This bar 63 is bifurcated at its lower end and the bifurcated portions are located on opposite sides of the shaft 34, as shown in Fig. 8, these bifurcated portions being located between the boss of the collar 69 and the hub of the gear 39.

The upper end of the bar 63 is connected to a pivot 64 which passes through slots in overlapping ends of two levers 65 which extend from the center of the unit to positions adjacent the sides thereof. The levers 65 are pivotally mounted on posts 66, one of which posts is mounted on the base plate Hi, the other being mounted on a bracket 86 carried by the base plate In. As best seen in Fig. 4, the levers 65 are located at the top of the device and their outer ends carry forwardly extending abutment members 61. The outer ends of the levers 65 are biased upwardly by springs 68 which will hereinafter be described. As a result of the pressure of these springs, the bar 63 is normally pushed downwardly except when it is positively elevated by the cam member 6|.

Upon the inner side of its pivotal support one of the levers 65 carries a pin 69 (Fig. 4) which is adapted to cooperate with a strip of insulation 10 carried by the upper leaf of the three-leaf switch 3|. When the bar 63 is elevated by the cam 6| as shown in Fig. 4, the pin 69 is elevated and the upper leaf of the switch 3| is raised upwardly away from the second leaf. The second leaf is biased away from the lowermost leaf so that the three leaves of the switch 3| are separated when the bar 63 is elevated. When, however, the projection 62 on the bar. 63 clears the cam 6| and the bar 63 moves downwardly, the upper leaf of the switch 3| moves downwardly into contact with the second leaf and carries this second leaf downwardly into contact with the third leaf so that the switch 3| is closed when the bar 63 is in its lower position.

The armature of the relay 32 is connected by means of a stripof insulation H to the lower leaf of a leaf switch 12 (Fig. 6). When the relay 32 is energized, the upward movement of the armature closes the switch 12. When the armature is in its lower position as shown in Fig. 6, a projection 13 carried by the armature engages the edge of an inwardly turned projection 14 on a bell crank lever 15. This lever is biased in clockwise direction, as viewed in Fig. 6, by a spring 16. When the relay 32 is energized, the armature moves upwardly, carrying the projection 13 above the inturned end 14 of the bell crank lever 15. This inturned end of the lever 15 then moves beneath the projection 13 so that the armature is held in its upward position and the switch 12 is held closed until the bell crank lever 15 is swung in counter-clockwise direction, as viewed in Fig. 6. When that movement of the bell crank lever 15 takes place, the armature of the relay 32 moves downwardly and the switch 12 is opened.

The bell crank lever 16 is intermittently moved by means of a cam member 11 which is rigidly carried on the right-hand end of shaft 34, as viewed in Figs. 5, 1 and .4. The cam member 11 carries a projection 18 which is adapted to engage a projection 19 carried on the horizontal arm of the bell crank lever 15 (Fig. 6). It will readily be understood that on each revolution of the shaft 34 the engagement of the projections 18 and 19 swings the bell crank lever 15 in the counter-clockwise direction as viewed in Fig. 6, so that the armature ofthe relay 32 is free to move downwardly and open the switch 12.

It may here be noted that in the normal condition of the machine the arms 5| and 52 are projected downwardly as shown in Fig. 4. The

bar 63 is held at its highest position by the cam as shown in that figure and the cam projection 18 is located from its operating position by a distance of 90 degrees as shown in Fig. 6. Upon the outer ends of the posts 66 previously referred to is rigidly mounted ahorizontal bar 80. The intermediate portion of this bar is turned forwardly to provide a horizontal flange 8 I This flange is provided with an opening 82 (Fig. 2) to serve as a guide for a locking bar 83. The extremities ofthe bar 80 are displaced forwardly to provide two vend portions 84. Two posts 85 project outwardly from the bracket 23 and support a horizontal'bar 61, which is located in the same plane as the outer ends 84 of the bar 80.

As shown in Fig. 1, the bar 81 is provided with a central enlargement 80 which is provided with an arcuate recess 89 for the reception of a disc 90 (Fig. '3) carried on the inner end of the rotatable member 9I of a tumbler lock 92. This lock is mounted by means of a bracket 93 (Figs. 1 and 3) upon the central portion 88 of the bar 81. The lower end of the locking bar 83 is secured to the disc 90 by means of a pivot pin 94. The lock 92 is so arranged that the key may be withdrawn therefrom at two positions at right angles to each projection 6| other. When the lock is in the relation shown in Fig. 1, the bar 83 is projected upwardly in front of a bar95 which is mounted on the cover 96 and which will hereinafter be more fully described. When the rotatable portion of the lock 92 is rotated in the clockwise direction through 90 degrees, as viewed in Fig. 1, the bar 83 is drawn downwardly clear .of the bar 95. A similar bar 63, also pivotally connectedto the disc 90 and guided in an opening in the chassis member 2 8, cooperates in the same manner and simultaneously with a bar 95' mounted on the lower end of the cover 96. e

The bracket 93 serves as a support for a switch 91 which is adapted to be actuated by a suitable key which can be inserted from the front of the v device.

On each side of the device is mounted a switch assembly 99. These switch assemblies are similar, with the exception that the contacts are located on the inner side of each assembly. Each switch assembly comprises a frame which includes a front rail I00, a rear rail IOI, an upper. frame member I02, a lower frame member I03 (Fig. 1), and intermediate frame members I04. The frame members I02, I03 and I04 are rigidly connected to the front and rear rails I and- I 0 I.

The switch frames are mounted on the outwardly displaced ends 84 of the bar 80 and on the ends of the bar 81 by means of screws I which extend through these ends and are threaded into the ends of the front rails I00. A locking bar I06 extends longitudinally through the center of the frame, being slidably mounted for axial movement in suitable openings I01 and I06 in the end frame members I02 and I03. The bar I06 extends freely through suitable openings in the intermediate frame members I04.

The upper reduced end of the locking bar I06 carries the spring spring bears against the upper side of the end frame member I02 and against a collar I09 rigidly mounted on the upper end of the locking bar I06. The upper ends of the locking bars are adapted to be engaged by the forwardly extending abutment members 61 previously referred to. It will readily be understood that when the cam 6| moves the bar '63 upwardly, the locking bars I06 will be depressed and when the cam 6| clears the projec-.

tion 62 the springs 68 will bias the locking bars I06 upwardly again.

Each switch assembly comprises a plurality, for

IIO. As best shown in Fig. 9, each selector bar comp-rises an outwardly directed shank portion I I I which is guided by an opening I I2 in the outer rail I00. It also comprises a body portion II3 which is provided near its inner end with an enlarged opening II4 through which extends the rear rail MI. The body portion II3 includes an axia1 projection H5 which projects forwardly in guiding relation through an opening H6 in the rear rail IOI. The body portion II3 also comprises an element I I1 which projects inwardly into the opening I I4 in alignment with the projection II5. A coil spring H8 is secured in position by the aligned projections H5 and H1. This spring bears against the rear rail IN and against the forward edge of the opening 4 so that it biases the selector bar I I0 outwardly.

The locking bar I06 extends through openings II9 provided in the selector bars 0. When the device is at rest the bar I06 occupies its full line position shown in Fig. 11, the abutments 61 being then in their lowermost position. Each bar I06 carries a plurality of locking detents I20, one of which is adapted to cooperate with each selector bar I I0. When the bar I06 is in its depressed position, that is, the full line position in Fig. 11, the

detents I20 are clear of their bars IIO. When, however, the bar I06 is released so that it may move upwardly, the locking detents I20 come into cooperative relation with their bars I I0.

In the case of-a bar IIO which has not been moved inwardly by its button I2I carried on the outer end of the shank III, for example, the

lower bar I I0 shown in Fig. 11, the upward move- I ment of the bar I06 moves the detent I20 into the upper end of the opening H9. The detent I20 is provided on its forward side with a flat face so that it is not possible to push in another button I2I until the locking bars I06 are again depressed 0 by the levers 65. In the case of an actuated bar IIO which has been manually pushed inwardly, for example, the upper bar. I I0 shown in Fig, 11, the detent I20 enters a locking aperture I 22 provided in alignment with and immediately on the 05 outer side of the aperture H9. Consequently the actuated bar H0 is held inwardly until the bar I06 is again depressed by' the abutment 61. Each carries a resilient washer I23 the inner'side of the locking bar IIO which is adapted to engage 7 front rail I00 when the bar H0 is in its outer or forward position.

68 previously referred to. This example in the present device 10, of selector bars spectively. Each switch assembly comprises a strip of insulation I21 which extends along the length of the assembly adjacent to and in spaced relation to the strips 124. The strip of insulation I21 is rigidly mounted on suitable projections on the end frame members I82 and I03 and onthe intermediate members I04.

Upon the strip 121 is mounted a series of contacts I28, one for each bar H8. The contacts I28 of both switch assemblies are connected together to a common line 528. As best seen in Fig. 12, the contacts I28 are always in engagement with the contacts I25 on the strips I24. When a bar H is moved inwardly by its button I2 5, for example, the uppermost bar in Fig. 12, its contact I is brought into engagement with the corresponding contact I mounted on the strip I21. The contacts I30 of both switch assemblies are connected together to a common line I35. It will thus be seen that when any button H8 is pushed inwardly, the conductors I28 and I3I are connected together.

The strip I21 carries along its innermost side a. series of bridging contacts I32 which are normally in series with the contacts I26. The lefthand assembly carries at its upper end a contact I33 in alignment with the contacts I32. This contact cooperateswith the contact I26 of the uppermost bar as shown in Fig. 12. A similar contact I34 (Fig. ,15) at the lower end of the lefthand strip I21 cooperates with the contact I26 of the lowermost bar. A similar contact I is mounted at the upper end of the right-hand strip I21 and a similar contact I36 is mounted at the lower end of this strip to cooperate with the contacts I26 of the uppermost and lowermost selector bars on the left-hand side.

The contact I33 is connected to the first six of the contacts 46 beginning at the lower left-hand portion of the disc 45 shown in Fig. 4 and is further connected to a conductor I31 (Fig. 15) The bridging contact I32 immediately below the contact I33 is connected to the seventh contact of the series 46 and the consecutive contacts I32 are in order connected to contacts 46 in the manner shown in Fig. 15. The contact I35 is connected to the contact I34 and also to the sixteenth contact of the series 46. The contacts I32 below the contact I35 are connected in order to the seventeenth to twenty-fourth contacts of the series. The contact I36 is connected to the last or twentyfifth contact of the series46.

In the inoperative condition of the device the contacts I26 connect the contact I33, the contacts I32 of the left-hand switch assembly, the contact I34, the contact I35, the contacts I32 and the contact I36 in series. When one of the buttons I2I is pressed inwardly, for example, the seventh button of the left-hand switch assembly, which corresponds to the selection of record No. '7, the seventh contact I26 is displaced inwardly to break this circuit. Consequently, only the first twelve contacts of the series 46 are connected to the conductor I31. As will hereinafter be explained, only the first twelve contacts of the series 46 are energized and the machine will function to transmit twelve impulses, with the result that record No. 7 is selected and played. Similarly, if any other button I2I is pressed, the corresponding number plus five impulses are transmitted and the corresponding record is selected and played.

The conductor I3I is connected to. one terminal of the motor 33 and to one of the leaves of the three-leaf switch iii. The other side of the motor is connected to a power line I38 to which is connected a conductor I39 and one side of the coin actuated switch 21. The other side of the switch 21 is connected to the relay 32. The other side of the relay 32 is connected by a conductor I40 to the other power line Iii. The conductor -829 is connected to one side of the relay actuated switch 12, the other side of which is connected to a conductor I42 which is connected to a conductor I43. The conductors I42 and I43 are connected through the switch 91 which is the main switch of the device to the power line MI. The conductor I40 is connected by a line I45 to one of the leaves of the threeleaf switch 3I. The conductor I42 is connected by a line I46 to the third leaf of the three-leaf switch 3|.

The thermionic tube 30 may suitably be a '10L'7GT tube comprising in the same element a diode plate I1I, a diode cathode I12 and a heater I13 for said cathode, and also pentode elements including aplate I14, a screen grid I15, a control grid I18, a cathode I11 and a heater I18 for said cathode. The transformer 29 comprises a. primary winding I19, one side of which is connected through conductor I43 and switch 91 to power line MI. The other side of the winding is connected by the conductor I39 to the power line I38. 1

The transformer comprises three windings I80, I8I and I62. The heaters I18 and I13 are connected in parallel to the winding I8I by conductors I82 and I83. One side of the winding I is connected to the plate "I, the other side being connected to the corresponding side of the winding I8I and to-the condenser 41, which suitably may be a 12 microfarad condenser, and to a resistor I84 arranged in parallel thereto. This resistor may suitably have a resistance of 20,000

ohms. The other sides of the condensers 41 and the resistor I84 are connected by a conductor I85 to the diode cathode I12, which is also connected by a conductor I86 to the conductive ring 50. The conductor I85 is connected to the line I82 through a by-pass condenser I81 which may suitably be a .005 microfarad condenser. The. conductor 4 82 is connected by a conductor I88 to one end of the oscillator coil 48. This end of the coil is connected through a condenser I89, which may-suitably be a .05 microfarad condenser to the conductor I29. The opposite ends of the coil 48 are connected through a trimmer condenser I 90 to the conductor I88.

The conductor I31 is connected to both the plate I14 and the screen grid I15 of the pentode elements of the tube 30 so that these elements act as a single plate. The cathode I11 is connected to a point on the oscillator coil 48, for example, the center tap of this coil, and it is also connected to resilient contacts 230 through a condenser 23I. The resilient contacts 230 normally bear against the lower ends of the bars I06 and are arranged to follow the bars upwardly until these bars approach their uppermost positions. In these positions the bars I06 are clear of the contacts 230. When the bars I06 are down, the transmitter is detuned and when they are up, the transmitter is tuned to the receiver. Thus the transmitter is detuned and rendered ineffective for transmitting purposes except when the bars I 06 are elevated into a high position. At that time the motor 33 has been in operation for a sutficient period of time to elevate the bars I08 into locking position as shown in dotted lines in Fig. 11. Consequently the transmitter is mainconductor I31.

from the diode cathode I12 through conductor 7 contacts 46.

tained in inoperative conditicn untii after the selector bars IIO are locked against manipulation.

The control grid I16 is connected through a condenser I8l to another point on the coil 48: The

atively close to the end of the coil which is con-' nected to conductor I88. The conductor I93 is connected through a resonant filter coil 49 and a trimmer condenser I94 to the conductor I38. When plate current is supplied to the plate elements I14 and I15, the pentode elements feed energy to the oscillator coil 48. This oscillator coil is tuned by the condenser I90 to a desired frequency, for example, a frequency of 250 kilocycles. Theresonant filter coil and the condenser I94 constitute a tune filter which is tuned to the same frequency. that is, 250 kilocycles, for example, by adjustment of thetrimmer condenser I Plate current is suppliedto the plate elements 1 I14 and I15 each time that the; arm 5| engages one of the contacts 46 which is connected to the Positive plate voltage is supplied I86 to the ring 50. This positive plate voltage is supplied to the arm 5| by the ring-50 and arm 52. When the arm 5I engages any one of the first six contacts 46 an impulse of plate current is supplied to the plate elements I14 and I15. Further impulses may be supplied to these plate elements as the arm 5I moves over the following The effect of the switch contacts I26 in their normal position is to connect all of the contacts 46 to the conductor I31. If one of the buttons I2I is actuated. for example, the button corresponding to selection No. '7, then the corresponding switch I26 is opened and only the first twelve contacts 46 are connected to the plate.

elements I14 and I15. Consequently these plate elements receive twelve impulses of plate voltage and the result is that twelve impulses of 250 kilocycles frequency are supplied to the power lines I38 and MI. Similarly, when any button is pressed corresponding to a selection bearing any number between 1 and 20, the lines I38 and MI receive a corresponding number, plus five impulses of 250 kilocycle frequency. These impulses are communicated to the. lines I85 and I69 of these rails at their lower ends (Fig. 1). The ears I82 at the upper end of the title holding frame are adapted to be engaged by clips I54 mounted on the forwardly displaced ends 84 of the bar 80. The reduced ends I53 of the rails I48 are adapted to be engaged by hook-formears I55 which are bent outwardly from the bar 88. Springs I56 mounted on the bar 88 force the re duced ends I53 firmly'against the hook-form ears The rear edges of the rails I48 are turned inwardlyiFig. 3) to provide flanges I51'which are adapted to hold a sheet 0f translucent material 7 I58 in position behind the title holding bars I50.

Behind the sheet I 58 of translucent material I provide a plurality of lamps I59 for the illumination of the cards on the title holding bars I50. The lamps I59 are supported in sockets I60 carried by arms I6I which are mounted on the front rails- I00 of theswitchv assemblies. The lamps.

I59 are connected in parallel and are supplied with current from the secondary I62 of the transformer 29.

The device is rovided with a removable cover 96 which is adapted to be applied over the mechanism and around the periphery of the base plate I0. The cover is provided with a window I64 whereby the titles on the title holding frame may be observed. The cover is provided with openingsl65 through which the buttons |2I project. The cover is also provided with openings (not shown) through which extend the forward portions of the lock 92 and switch 91 so that they may be actuated from the exterior of the cover.

The cover is also provided with a, recess I66 which is conformed to the base of the coin receiving receptacle II so that the coin receiving receptacle II is exposed and likewise the button I6 which is mounted in the base, thereof. I The cover is likewise provided with an opening-I61 in alignment withthe open end of the rejected coin pocket I4 (Fig. 3) so that rejected coins may be retrieved by the operator. The cover is also provided with a recess I68 adapted to accommodate a cable I69 which includes the two power lines I38 and NI, this cable being suitably provided I86 which extend through the-building and they pass in this way to the main unit which will hereinafter be described. v

Between the two verticalv rows of buttons I2I' I mount a title holder I41 which comprises two side rails I48, a top rail I49 and a similarbottom rail. (not shown),-these rails being connected to provide a rectangular frame. The two siderails I48 are connected by 1a series of title holding bars with a plug I10" whereby the device .maybe plugged into any suitable power outlet.

My remote. control unit may be employed to control the operation of a phonograph which is energized from the power lines I85 and I86 and to effect the playing of any desired record thereon corresponding to any one or more of the selector buttons I2I; For example, the remote control selectorjmay be associated with the phonograph described in my copending application Serial No.

259,586, now U. S. Letters Patent 2,388,595 granted Novemberfi, 1945. My improved remote control selector may also bev employed in connection I50 which extend in the horizontal direction and are located in obliqumposition as best shown in Fig. '1. These bars. have stamped out of them 'clip formations I5I'"which are adapted to hold title cards in position-for view from'the front of the device.

As best see-n in Fig. 5, the title holding bars I50 are located in alignment withthe buttons I2l so that a card bearing a title of the recording controlled by each button I2I may be located alongside'that button. -The titleholdingframe may be held in'position by means of ears I52 which-project laterally from'the rails I48 at their upper end and by means of'reduced extensions with the phonograph described and claimed in application Serial No. 342,419. filed of even date herewith by Marion R. Winkler.

The solenoids I are atranged in a circular series, each including an armature 240 which is normally in its low position shown on the left of Fig.'1'7. The armatures 240'h-ave lower extensions 24I which carry cylindrical insulating pieces 242 and conductive pieces 243. The insulating pieces.242 are normaly engaged by an insulated spring 244. When one of the solenoids I95 is energized its armature 240 is moved upwardly bringing its conductive piece 243 into engagement with the. insulated spring '244 thus grounding the spring 244 through the frame 245 which supports thesolenoids I95. as shown on the right-hand side of Fig. 17. The insulated spring 244 is connected to one side of a switch 246, the other side of which is grounded. The common sides of the spring 244 and the switch 246 are connected to a relay 241. The switch 248 of the relay 241 is in series with the phonograph motor 249, motor 249 and the switch 248 being connected to the power lines I85 and I86. The other side of the relay 241 is connected to the secondary of a transformer 250, the other side of the secondary being grounded. The primary of the transformer 250 is connected across the power lines I85, I86. When the phonograph is at rest, the switch 246 is open. When one or more of the solenoids I95 is energized its armature 240 is moved upwardly and the relay 241 is energized by the completion of the circuit 243, 244, relay 241 and secondary of the transformer 250. Consequently, the switch 248 is closed and the motor 249 is put into operation to effect the record changing cycle of the phonograph and to play the corresponding record. At the beginning of the record changing cycle, the switch 246 is closed so that the motor 249 remains in operation until the selected record or records have been completed. The phonograph comprises a shaft I which is given a complete revolution during each record changing period. The shaft 25I carries with it a disc 252 which is provided with an abutment 253 which is adapted to engage non-ferrous pins 254 which have been projected upwardly by actuated armatures 240. The nonferrous pins 254 are slidably supported so that they move upwardly with their armatures 240, as shown at the right of Fig. 17. The shaft 25! is driven through a frictional connection so that it is arrested when the abutment 253 strikes an upwardly displaced pin 254. The shaft 25I is connected to the phonograph selector so that the record played depends upon the point at which it is arrested by one of the pins 254.. The disc 252 carries'a slidable member 255 which is projected downwardly momentarily during the latter part of the record changing cycle. The member 255 is so located that it i in alignment with the pins 254 which has arrested the abutment 253.

It will readily be understood that if my selector is operated so as to energize a plurality of solenoids I95, the motor 249 is maintained in operation during the playing of the corresponding records, the corresponding pins 254 being engaged one after the other by the abutment 253 so as to control the playing of the corresponding records one after the other. Before the last record has been completed the member 255 pushes down the last pin 254. Before this occurs the switch 246 is closed and consequently the relay 241 is energized until the last record is reproduced. Thereupon, the record changing cycle starts opening the switch 246 so that the motor 249 is deenergized. The motor remains out of operation until one or more of the solenoids I95 is again energized.

The electrical system whereby the impulses transmitted over the lines I85 and I86 are picked up and caused to energize the corresponding solenoids I95, will now be described, it being understood that the devices illustrated in Fig. 16 are located on the phonograph and not on the remote unit which has been previously described.

This electrical system on the phonograph comprises apower supply unit I96, a rectifier I91 for the supply of direct current to certain relays, and an amplifier I98. The amplifier I98 is adapted to rezeive the high frequency impulses delivered by the oscillator in the remote control unit and to amplify and rectify these impulses. The final result or these impulses is the energizetion of a gas tube I99 at the output end of the amplifier. This gas tube may suitably be a 2A4G tube and its plate is supplied with alternating current. Owing to the alternation of the plate voltage, the gas tube I99 is rendered inoperative at the termination of each impulse. Consequently, the gas tube is rendered operative for a short time when each impulse is being received. The result is that a relay 202 is energized for a corresponding number oftimes and the switch 203 is closed for that number of times.

On the first closure of the switch 203 the relay 204 is energized, the winding of the relay 204 being in the plate circuit of the rectifier I91. The relay 204 is'a time-delay relay and consequently it remain-s energized during a series of impulses transmitted from the oscillator in the remote control unit. When the relay 204 is energized, the switch 205 is closed, the switch 206 is opened and these switches remain closed and opened, respectively, during a series of impulses corresponding to the recording selected. When the switch 205 is closed, the relay 201 is energized, and the switch 208 is closed.

The cathode of the tube I91 is connected to the winding of the relay 204 and to one side of the switch 205. The other side of the relay 204 is connected to one side of the switch 203. The other side of the switch 205 is connected to the winding of the relay 201. The switch 206 is connected to one side of the switch 208. The other side of switches 203 and 208 and the winding 201 are connected to the power line I86. The two switches 206 and 208 are connected together and the other side of the switch 206 is connected to the common line 2I0 of the solenoids I95.

The relay 202 effects the stepwise movement of an arm 2II of a stepping relay M2. on the first impulse the arm 2 is moved into contact with the first of a series of contacts 2I3 which correspond to the contacts 46 of the remote control unit. The second impulse of the series brings the arm 2 into contact with the second contact 2 I3 and so forth. Thus, when selector button I2I corresponding to recording No. '1 is actuated, twelve impulses are transmitted over the power lines and the relay 202 is actuated twelve times. Consequently, the arm 2II moves into engagement with the contact 2I3 which is connected to the solenoid I95 corresponding to recording No. '1.

The relay 204 controls means which prevents the return of the arm 2 to initial position during the period that a series of impulses is being received. At the end of the series of impulses the relay 204 becomes deenergized and the relay 201 becomes deenergized so that the arm 2 is released and returns automatically to its initial position. The arm 2 is adapted to engage any one of the contacts 214 and it is also in contact with a strip 2I4 of conductive material. This strip is connected to the power line I 85. 1

When a series of impulses is transmitted from the remote control unit, the receiver I98 picks up these impulses, being tuned to the same frequency. Consequently, the relay 202 is energized a corresponding number of times and the arm 2 I I is moved to the contact 2I3 corresponding to the recording selected. When the switch 203 is closed by the first impulse, therelay 204 is closed, closing the switch 205 and opening the switch 206. The closing of the switch 205 energizes the relay 201 and the switch 208 is closed.

While the series of impulses is being received, switches 205 and 208 are closed while switch 206 is open. Owing to the open condition of the switch 206, no circuit can be completed through the solenoids I95 during the reception of a series of impulses. When the series of impulses is terminated, the switch 203 opens. As a result after a slight delay, switch 205 opens and switch 206 closes. Before the switch 208 opens, a circuit is completed for a brief interval from power line I86, switch 208, switch 206, conductor 2I0, the solenoid I95 corresponding to the position of the arm 2| I, the corresponding contact 2I3, arm 2i I, conductive strip 2 I 4 and power line I85. This circuit is broken by the deenergization of the relay 201 which permits the switch 208 to open.

When the relay 204 is energized, the arm 2 is released so that it can return to its initial position. Before the arm 2 moves away from'the contact 2I3 with which it is in engagement, the circuit through the arm 2I I, the solenoid I95 corresponding to its position, and the switches 206 and 208, is completed for a short instant and the switch 208 opens before the arm 2 is moved away from its position corresponding to the selected recording.

As described in the aforesaid application Serial No. 342,419 filed of even date herewith by Marion R. Winkler, the energization of the solenoid I95 corresponding to the selected button I2I results in the playing of the corresponding record. It is further to be noted that any desired number of solenoids I95 may be actuated by the remote control unit with the result that all the corresponding recordings may be reproduc'ed by the phonograph and when the armatures of all the' solenoids I95 have been returned to initial position, the operation of the phonograph is terminated.

In normal operating condition the cover 96 encloses-the mechanism of the remote control unit, the bars 83 and 83 being in locked relation to the bars 95 and 95. The main switch 91 is turned on by a suitable key and the remote control unit is ready for actuation, it being understood that current is being supplied to the phonograph. The abutments 61 are holding the lockingbars I06 depressed so that they occupy their full line position shown in Fig. 11.. Consequently, if one of the buttons I2I is pushed inwardly, it will not remain in its innermost position. 4 Such actuation of one of the buttons I2I will have no effect, because switches 12 and 3I are open.

A coin is now inserted in the coin receiving member II and the switch 21 is closedmomentarily. The closing of the switch 21 energizes the relay 32 and its armature is latched in its uppermost position, closing the switch 12. When one of the selector buttons I2I, for example, button No. '1, is now actuated, the corresponding contact is moved to circuit-opening position and the corresponding contact I25 is moved to circuitclosing position. The result is that the motor 33 goes into operation.

Immediately the motor 33 starts driving the shaft 34, the cam 6| clears the projection 62 so that the bar 63 is able to move downwardly and the locking bars I06 are moved upwardly, both movementsbeing efiect'ed by the springs 68. Th downward movement of the bar 63 and the adjacent portions of the lever 65 results in the closing of the three-leaf spring 3|. The upward movement of the locking bars I06 enables one of the detents I20 to project into the opening I22 of the actuated selector bar IIO. Consequently,

the corresponding switch contact I125 remains in closed position and the corresponding contact I26 remains in open position until the bars I06 are again depressed.

latched and is moved by its spring downwardly to open the switch 12. 'At this time the switch 3| is closed so that the motor continues to opcrate through the circuit which includes conductor I45. It is to be noted that the opening of the main switch 91 will not interrupt the operation of the motor. If this were possible, a plurality of records could be played for a single coin by one possessing the key controlling the switch 91. As has been heretofore pointed out,

' the opening of the contact I26 corresponding to a particular recording, for example, recording No. '1, has the effect of connecting conductor I31 to the first twelve contacts of the series 46.

The arms 5I and 52 moving .over the contacts 46 consequently connect the cathode I12 to the plate elements I14, I15 of the tube 30 twelve times.

Twelve high frequency impulses having a frequency of 250 kilocycles are supplied to the lines I and I86. After the arm 5I has moved over all the contacts and when theshaft 34 has almost made one revolution, the cam BI engages the projection 62 and moves the bar 63 upwardly. This upward movement results in the downward movement of the locking bars I06 and the opening'of the switch 3|. The motor circuit is now broken and the motor remains inoperative until another coin is inserted.

It may here be noted that if two of the buttons I2Iare pushed atone time, only one series of impulses will be transmitted, being that" series corresponding to the button of lowest number. This results from the fact that the button of lowest number, for example, button No. '1, moves the corresponding'contact I26 to open position so that all of the contacts 46 above the twelfth of the series are disconnected from the con ductor I31. After the switch 12 is opened. another coin may be inserted to close this switch and after the motor 33 stops/operating, any of the other buttons I2I may be actuated to select another recording. When this is done a corresponding number of impulses of high'frequency' current ar supplied to the lines I85 and I86.

Each series of impulses is transmitted through the wires I85 and I86 to the amplifier I98 and the relay 202 is energized a corresponding number of times. Thus, if the button I2I corresponding to selection No. 7 is actuated, twelve impulses go over the lines and the relay 202 is actuated twelve times in succession. Such action, as has been previously described, results in the movement of the arm 2 into the twelfth contact of the series 2I3. When the series of impulses ceases, a, current flows through the solenoid I connected to the twelfth contact of the series 213 and the displacement of the armature of this solenoid results in th playing of recording No. '7. Actuation of any of the other buttons I2I likewise results in the displacement of the armatures of the corresponding solenoids I95, and, as previously indicated above, the phonograph continues to play the corresponding recordings until all the actuated armatures have been returned to normal position and the corresponding recordings played.

My improved remote control devices described above may readily be adapted for selection by space transmission. For this purpose the remote control unit may be provided with an exposed loop antenna 220 (Fig. 15A,), instead of the oscillator coil 48. The ends of the loop antenna are connected together and to the conductor I88. The antenna 'circuit includes a trimmer condenser 22I and is tuned by this condenser to a suitable frequency, for example, 250 kilocycles. The cathode III of the tube 30 is connected to a suitable point, for example, the mid point of the antenna. The grid I16 is connected through the condenser I9I and the grid leak I92 to another point on the antenna, as shown in Fig. 15A. The antenna 220 and condenser 22I replace the oscillator coil 48 and condenser I90 of the previously described embodiment. Th antenna is put into oscillation when the pentode elements of the tube 30 are rendered active in the manner previously described and each impulse is broadcast by the antenna 220.

As shown in Fig. 16A, the amplifier I98 may be modified to receive'the impulses transmitted by the antenna 220. For this purpose the primary input coil is omitted and the secondary coil is replaced by an antenna 222 which is tuned by a condenser 223 to the same frequency. This antenna is connected to the control grid of the first tube of the amplifier I98. It 'will be readily understood that when the device is operated in the manner previously described, the loop antenna 220 transmits a series of impulses corresponding to the record selected and that these impulses are received by the antenna 222 with the result that the relay 202 is energized a corresponding number of times, with the result that the phonograph is put into operation to play the record selected.

It will also be understood that in the case of this embodiment, any number of recordings may be selected and the corresponding armatures of the solenoids I95 will be displaced. The phonograph will operate to play all the'corresponding records and return the corresponding armatures of the solenoids I95 to initial position. This embodiment of the invention operates in precisely the same manner as did the embodiment of the invention first described, with the exception that the series of signals is transmitted from the remote control unit to the phonograph by space and 188.

Although the invention has been disclosed in connection with the specific details of preferred embodiments thereof, it must be understood that such details are not intended to be limitative of the invention except in so far as set forth in the accompanying claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. A control mechanism for selective phonographs comprising individual means adapted to be actuated to effect the playing of a corresponding recording, a control circuit comprising one of a series of contacts, switches connecting said contacts in series and a conductive member adapted to move over said contacts, a plurality of selector members adapted to open any of said switches whereby to cut any desired number of contacts out of saidcircuit, motor means for causing said member to move over all of said contacts, a switch associated with each of said selector members for controlling the operation of said motor means, a coin-controlled switch in series with last said switch, a switch in parallel with the coin-controlled switch, means actuated by the motor to open the coin-controlled switch and to open and close the parallel switch, and means responsive to the closing of said circuit for a definite number of times to actuate a corresponding individual means.

2. A selector mechanism for selective phonographs comprising individual means adapted to be actuated to efiect the playing of a corresponding recording, atransmitter tuned to definite radiofrequency, means for detuning said transmitter, automatic selective mechanism for controlling said transmitter to cause it to transmit a definite number of impulses corresponding to a desired recording, manual means for initiating the operation of said mechanism, means operated by said mechanism for rendering said detuning means ineffective, means adapted to receive impulses of said radio frequency, and means controlled thereby adapted to actuate said individual means in accordance with the number of impulses received.

JAMES A. BOYAJIAN. 

